Greywacke and Phonolite Definition

Definition of Greywacke and Phonolite

The general Greywacke and Phonolite definition can be stated as: Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay. On the other hand, Phonolite is an uncommon extrusive igneous rock volcanic rock of intermediate chemical composition between felsic and mafic. Along with definition of Greywacke and Phonolite, get to know about Properties of Greywacke and Phonolite. Get to know more information about Greywacke and Phonolite origin and discoverer, etymology and class.

History of Greywacke and Phonolite

The history of Greywacke and Phonolite gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Greywacke and Phonolite Origin and Discoverer

Greywacke and Phonolite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Greywacke and Phonolite. In this section, you will know about Greywacke and Phonolite Origin and Discoverer. Origin of Greywacke and Phonolite are Unknown. It is interesting to know the name of Greywacke and Phonolite discoverer. The discoverer of Greywacke and Phonolite are Unknown.

Etymology of Greywacke and Phonolite

Along with Greywacke and Phonolite definition, know more about the etymology of Greywacke and Phonolite. Etymology of Greywacke and Phonolite gives information about origin and formation of a particular rock. Know more about Formation of Greywacke and Formation of Phonolite. The etymology of Greywacke is From German Grauwacke, from grau grey + wacke while that of Phonolite is From German Grauwacke, from grau grey + wacke. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Greywacke belongs to Sedimentary Rocks while Phonolite belongs to Igneous Rocks. The sub-class, group and other categories of Greywacke and Phonolite are listed below.

For Greywacke,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock

For Phonolite,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock